HALO: Better strings

Change-Id: Ia3117a86a59b2318180e5f580c5f1d234042c7c7
HALO: make a trusted overlay

Change-Id: Ia607430d28330238b74037d7c03181398e5cee2b
HALO: add hdpi and mdpi drawable

Change-Id: Ia19cdaf7eb008fd099d33168cc4724579ebe49c2
SystemUI: Simplified Chinese Translations

Change-Id: I34b4f463626cef7ea6466281e8e7b13a90e8d3e5